WANG Ren-chao, CAO Ting-ting, LIU Yan-ru. Implementations of hypoplastic model based on different time integration algorithms[J]. 2017, 38(5): 1510-1516.
WANG Ren-chao, CAO Ting-ting, LIU Yan-ru. Implementations of hypoplastic model based on different time integration algorithms[J]. 2017, 38(5): 1510-1516.DOI: 10.16285/j.rsm.2017.05.035.
It is well known that the constitutive relation plays a key role in the nonlinear finite element analysis
and a time integration is particularly required to solve the problem whose stress response is deduced by its strain increment. The hypoplastic rate constitutive model is represented by Jaumann stress rate and deformation rate
and on the basis of this model
we develop adaptive implicit and explicit integration methods with local error control respectively. Meanwhile
the consistent tangent modulus is given for the implicit integration. Based on two different element tests
results of two types of numerical simulations of integration algorithm are compared by using ABAQUS. Moreover
a UMAT-VUMAT interface is developed to implement the transition from ABAQUS/Standard to ABAQUS/Explicit and then the flow chart of this development is presented. Therefore
the existing UMAT subroutine can be used for large deformation or high-degree dynamic problem analysis. Finally
the accuracy of numerical results is verified by a case study.